On January 23, 1968, the USS Pueblo, a Navy intelligence vessel, is engaged in a routine surveillance of the North Korean coast when it is intercepted by North Korean patrol boats.

According to U.S. reports, the Pueblo was in international waters almost 16 miles from shore, but the North Koreans turned their guns on the lightly armed vessel and demanded its surrender. The Americans attempted to escape, and the North Koreans opened fire, wounding the commander and two others. With capture inevitable, the Americans stalled for time, destroying the classified information aboard while taking further fire. Several more crew members were wounded. Finally, the Pueblo was boarded and taken to Wonson. There, the 83-man crew was bound and blindfolded and transported to Pyongyang, where they were charged with spying within North Korea’s 12-mile territorial limit and imprisoned."  On December 23, 1968, 11 months after the Pueblo‘s capture, the surviving 82 crewmen walked one by one across the “Bridge of No Return” at Panmunjon to freedom in South Korea.  Read more.
Source History.com